At what speed does ram recovery typically occur in most engines?

Ram recovery in jet engines refers to the phenomenon where the engine's performance improves due to increased airflow at higher speeds. This typically occurs as the aircraft accelerates, allowing the engine to take advantage of the dynamic pressure created by the forward motion.

The correct choice indicates that ram recovery commonly begins at around one hundred forty knots. This speed is generally recognized as the point where the benefits of increased ram air pressure substantially enhance the engine's efficiency and thrust output. At this velocity, the airflow into the engine is optimized, improving combustion efficiency and potentially reducing fuel consumption relative to power output.

Understanding the timing of ram recovery is important for flight operations as it influences how pilots manage engine settings and throttle positions during different phases of flight, particularly during acceleration and climb.